Rapid Evaluations of Anticlogging Performance of Drip Emitters by Laboratorial Short-Cycle Tests
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 134, Issue 3
Abstract
Emitter clogging is the most annoying problem that restrains the development of drip irrigation technologies, but so far, there have been no effective evaluation methods for the anticlogging performance of drip emitters. In this study, a kind of short-cycle experiment was conducted in the laboratory by mixing sands with various concentrates and particle sizes in irrigation water. Through these tests, the clogging rates that quantitatively represent the clogging status of drip emitters in various experimental conditions were obtained, as well as the variation rules of emitter discharges. The statistical calculation results indicated that the anticlogging performance of predepositing drippers was better than round-flow drip tapes, but less than eddy drip arrows. The discharges of every emitter tested differed from each other and most were lower than nominal discharge rates. However, a few emitters had a contrary result. An important modification had been done for the Christiansen uniformity coefficient to accurately evaluate irrigation uniformity and the clogging status of drip emitters. As a result, a new method of rapid evaluation for the anticlogging performance of drip emitters was proposed.
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Acknowledgments
This study is supported by the state “863” project of China CFD modeling and development of drip emitters, Grant No. UNSPECIFIED2006AA100214-8, Postdoctoral Science Fund of China Modeling and numerical simulation of structure-water-solid-gas multidimensional coupling flow field in drip emitters, Grant No. UNSPECIFIED20060400248, and the Transferring of Agricultural Achievements of Science and Technology Fund Production and popularization of HW series of drip emitters, Grant No. UNSPECIFIED2006GB23600448.
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© 2008 ASCE.
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Received: Mar 29, 2007
Accepted: Aug 13, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
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